Fan



Jan. 15, 1929. 1,699,201'

E. F. GUTH FAN Filed Nov. 27, 1928 3 Sheets-Sheet 2 EZ; ,a

Jan. 15, 1929. 1,699,201

E. F. Gu-rH FAN Filed NOV- 27. 1928 3 Sheets-Sheet 5 Parental Jan. 15, 1929.

PATENT' oF FICE.

EDWIN F. GUTH, 0F 'WEBSTER 'GROVES, M ISSOUBI.

FAN.

Application med November 27, 1928 Serial No. 322,290.

This application is inpart a continuing application of my co-pending application, Serial Number 289,714.

My invention relatesto fans,

and more particularly to' a certain typeof -trifugal fans. I My invention has for its object to produce a fan which will cause an etficientcirculation of air in the lower ortion of a room. vwithout materially distur ing the air in the upper portion thereof. I accomplish this by a construction which will induce a column of 'air into the fan. The air is then turned by the vanes in a substantially reverse direction, being propelled and directed down- 4Wardly and outwardly in an annulus of a con'oidal shape. The air leaves the fan in a relatively thin annulus which spreads as it leaves the vanes of the fan, the air in the annulus moving in a directionJ which is more than 90 from its movement as it enters the fan. The air in the upwardly moving column is larger at its base than when it reachesthe fan. v

' The preferred form for embodying my invention-enables me to produce a unit consistin of a small verticalmotor having a dish-s aped multi-blade fan, the blades being formed on the disk on the concave side. .As illustrated in the drawings, it is shown on the side away from the motor. These vanes extend 'inwardly a short distance and form an annulus adjacent theperiphery of the disk.

In the device as illustrated in the' drawings and as described immediately above, the fan will produce a conoiclal shaped air circulating zone having an induced up draft which is surrounded by this angularly disposed forced down draft whereby a'n improved cooling effect is accomplished. With the unit properly hung as to height, a very pleasant breeze will be noted throughout the entire area normally occupied, keeping the cool air,

which would normally be found in the lower part of the room, in constant circulation, but

' eliminating from circulation that strata of warm air whicl normally collects in the' upper part of the room. The air distribution from the tip of the vanes will be quite uni-` form throughout the entire revolution of the fan. This results in a uniformdistribution of air to all sides.

A further object of my invention is to construct a-fan stamped fromv sheet m`etal,.the yanes being cut and formed without removfan, i. e. cening any of the netal from the disc. this it follows that if the sheet is of uniform thickness, that the fan cwill be balanced and will retain its balance indefinitely.

'In the acconpanying drawings I have illustrated a form which will accomplish the foregoing objects and is an embodiment of my invention. These drawings, however, are

.furnished solely for illustraqtive purposes and I do not desire to be understood as lim- 'iting myself to the specific structure shown and described.

As shown' in the drawings: I

Fig.1 is a side elevation of a form of my fan showing its primary elements.

Fig. 2 is a-cross'section of the fan taken substantially on line 2-2 of Fig. 1.

Fig. 3 is a bottom plan view of the fan as shown in Fig. 1. a

Fig 4 is a fragmentary sectiontaken on line 4-4 of Fig. 2 showing a vertical cross section of one of the vanes of the fan.

adapted to circulating heated air,l a part of the fan disc being broken away to show interior construction.

Fig. 6 isa side elevation of a form of fan embodying my inventio i Fig. 7 is an isometric perspective view of the same. Similar reference numerals refer to similar parts throughout the entire description.

As shown in Fig. 1, a verticallyarranged electric motor-1 is suspended from a ceiling (not shown) by a pipe 3, the pipe haiving a conventional slip Canopy 5 at. its u perl end. The electric wiring leading to I tiie motor passes through said pipe 3. The motor is wound for running in a counter clockwise direction. As illustrated, I have provided a desi'able means to secure the disc7 to the motor shaft 4, which consists of asteel plug 9, which is threaded onto the shaft 4 and having a stcm 11 which extends through the disc 7v and also through a steel washer 13. This stem 11v is then pee-ned over the washer and thus clamps the disc 7 to the plug 6.* By running the motor in a counter clockwise direction, the tendency of the fan when in motion will be to tighten the plug'9 on the shaft 4. Thus an efi'ective,si`mple' and` neatly appearing-fastening is produced.

The vanes of the fan are formed from the outw'ardly directed portion 17 of the disc 7 adjacent its periphe''y 19 by cutting out From and bending in a direction away from the motor a series of vanes 23 in such a fashion that the material forming the vanes 23 is cut and bent down fron the material adjacent the peripheral portion 19 of the fan disc, thereby leaving spaces or openings 25.

As clearly seen in the drawings, the spaces or'openings 25 are of such size as to leave a considerable portion of metal intermediate each of the openings `forming what may be termed a bridge. This bridge 30 of metal extendsahead of the vanes and partially over the space between the bent. portions of the'vanes and cooperates thcrewith to direct the air. Although I have described the vanes and disc as'being integrally formed, this is not' necessary but is merely the preferred construction. Preferably -the edge of the disc isv beaded by overrolling as indicated at numeral 21. The vanes'are given a slight inclination backwardly froml the vertical taking the directionv of moving as indicating the i and downwardly in the manner herenbefore forward side.- This movement is indicated by means of an arrow' shown in Fig. 3: Each blade is also given a back pitch with n reference to a radial' line by forming the -inner portion of each blade to lead the outerA portion in peripheral movement. After the blades are cut and bent in the manner and position described,.they are made more rigid and at the same time provided with Ja guard by spot-welding to their lower edges a plurality of wire rings ,27. The rings do not interfere to any extent with the eirculatiqn of air'to, through or fro1n the fan.

The operation of the fan is as follows:

The motor ;1 is so wired that when it is turne'd on,.it rotates the disc in such a directionthat the vanes have an outward radial back pitch (referring to the direction of rotation) 'and a back slope with respect to the vertical, so that a current of air is induced which then moves radially and downwardly in an annulus of conoidal shape.

The rotation of the fan induces, an axial up draft primarily toward and directly into the'blades by way of their unobstructed bottom edges. This air-is then defiected by thel vanes and thrown outwardly and clownwardly. The centrifugal effect from the rotation of the vanes produces a partial vacuum so that the circulation is continuous and uniform.

Practice has shown thatwhen'a fan is constructed as above described, that substantially' no air will pass in either direction through the' openings 25, and that-I am able lto control and direct -the.air below the disc in a predetermined'manner without materially. disturbing theair above the disc., The

I fan should be so hung that its general plane willbe substantially horizontal and above the heads of the voccupants ofl a room.. This has the effect of dividing the upper portion of the room from the lower portion. 'The air at the bottom of said. tube 31 for removably' accommodating an electrical resistance heating element 33 'adapted to project downwardly and bepositioned within the confines of the aircone. The fan is aflixed to and rotatable with the hollow-motor shaft around the tube 31. The result is that the solid disc functions to radiate heat into the column of air being drawn up. This radiantly heated air, together with the convected heat from the resistance element is projected outwardly described for the cool air. It is to be understood that some air is drawn up centrally by the drag of the cylindrical column of air approachin the bottom of the blades. Thisr airv is de ected by the inner portions of the disc and is drawminto the inside edges of the `or blades comprises a forwardlyand downwardly sloping tractor element 18, shaped to draw the air upwardly in a central column,

and .another portion 16 which then .direets this air and thrusts itoutwardly and downwardly in the conoidal form hereinbefore described. Inasmnch as the portion 18 is balanced so as to draw upthe required volume of air to supply the partial vacuum created i A by the rotation of the portionl substantially no air will be drawnffrom above the horizontal plane occupied'by the fan, the blades being so bent and formed that it will function precisely'as Where the disc is used. Asshown in the drawings, theildower edge of each portion 18 is preferably curved forwardly so as i to enhancethevtractive action. The portion 16, as illustrated` lies in a plane above the plane of the tractive portion 18 and maybe provided with some ontward back pitch 4referring to a radial line. In some cases, it may be found desi'rable to impart to, the por- -tionfl a 'forward npward slope, as illustrated inFig. 7. A forward curvature may upwardly also be given to the top of these parts 16 to further assist in deflecting outwardly moving air into a downward direction.

Having described my invention, what I regard as new and esire to secure by Letters Patent is: I

1. A fan' mechanism comprising a fan, and means to rotate. said fan, a plurality of vanes 011 said fan in an annulus adjacent its periphery, said vanes being slightly inclined from the perpendic'ular with respect to the fan and given a back pitch with reference to the radius, whereby rotation of the fan Will draw the air direI-tly into the vanes and thrust it outwardly after 'turning the air through an angle of more than fromv that of the entering air. i

2. A fan mechanism comprising a fan and means to rotate said fan, a plurality of vanes in an annulus on said fanadjacent its periphery, there being alternate open and closed spaces in the annulus, the closed spaces located in front and the open spaces in the rear of the vanes, which vanes, when the fan is rotated, draw the air upwardly in a column and thrustit outwardly below the horizontal plane occupied by the fan.

3. A fan mechanism comprising a fan and means to rotate said fan, a plurality of vanes on said fan forming an annulus adjacent its periphery, there being openings intermediate said lvanes and a bridge in front of each vane and coacting with the vanes,' whereby the rotation of the fan will .draw the air directly into the vanes which thrust it outwardly and downwardly below the horizontal plane occupied by the fan.

4. A fan mechanism comprising a fan and means to rotate said fan, a disc, a plurality of vanes thereon slightly inclined from the perpcndicular with respect to the disc and `given a back pitch with reference to the radius, whereby the rotation of the disc will draw the air upwardly axially of the fan and propel it out-wardly and downwardly below the horizontal plane occupied by the fan.

5. A fan mechanism comprising a fan and means to rotate said fan, a disc. means on said disc to draw the air upwardly into thg fan, and means cooperating therewith tov thrust the air outwardly and downwardly in agn annular path without materially disturbing thel air above the fan.

6. A fan, comprising a dish-shaped disc stamped from sheet metal, vane portions cut and bent from said disc in an annulus adjacent its periphery, there being alternate open and closed spaces in the annulus, the closed space located in front, and the open space at the back, of each of the vane portions, said vane portions being slightly inclined from the perpendicular'with respect to the disc, the vanes, when rotated, drawing the air and directly into them and then thrusting the air outwardly and downwardly it outwardly and sheet metal, vane portions cut and bent from said disc in an annulus adjacent its periphery,

lthere being openings in the disc intermediate said vane portions and a bridge portion in the plane of the disc in front of eachvane portion, whereby the rotation of the fan will cause the air below the fan to be moved upwardly in aicolumn into the' fan and' be propelled and directed outwardly and downwardly in an annular path.

8. A fan, comprising a disc stamped from sheet metal, vane portions cut and bent from said disc adjacent its periphery, said disc having an open space adjacent each vane portion and a considerable portion of metal which extends'over the space intermediate the vane portions and in front of the same, said vane portions being slightly-inclined from the perpendicular ,with respect to the disc and given 'a back pitch with reference to the radius, whereby rotation of the vanes will cause the air below the fan to move upwardly in a column into the vanes, which then thrust downwardly below the horizontal plane occupied by the fan.

9. A fan, means to rotate said fan, said fan comprising a'disc, a multiplicity of vanes thereon, said disc and vanes being so shaped as to draw air directly into the vanes and then propel and turn substantially all of it outwardly and downwardly in an annular path in a direction more than 90 from that of the entering air.

10. A fan, means to rotate it, said fan comprising a multiplieity of vanes formed thereon to draw the air upwardly into the vanes. and means cooperating with said vanes to turn said air and direct and propel it in Van annular path in a direction more than 90 from the direction of itsl movement in entering the fan.

11. A fan, means to rotate said fan, means comprised in said fan to draw the air upwardly into the fan, and means cooperating with said last mentioned means to thrust the air outwardly and down-wardlyn a relatively thin conoidal-shaped annulus as it leaves the fan.

12. In a 'device of the character described, a disc, means to rotate said disc, means on said disc for inducing a column of air into the said means and means vcoacting with said first mentioned means foroboth directing and propelling said air in an annular conoidal path outside of and in a direction more than 90 from that of the movement of the air in said column.

In testimony whcreof, I have signed mv name to this specification this 24th day of November, 1928.

EDWIN F. GUTH.

an annular path after turning the air 7. A fan, comprising a disc stamped from llO 

